<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>

<div id="app">
  <ul>
    <li v-for="i in letters" :key="i">{{i}}</li>
  </ul>
</div>

<script src="../js/vue%20.js"></script>
<script>
  const app = new Vue({
    el:'#app',
    data:{
      letters: ['A','B','C','D','E']
    }
  })
</script>
</body>
</html>